#include <iostream>
#include <fstream>
#include <vector>
#define Nmax 50001
using namespace std;
ifstream f("sortaret.in");
ofstream g("sortaret.out");
int viz[Nmax],rez[Nmax];
vector <int> v[Nmax];
int k;
void DF(int x)
{
    viz[x]=1;
    for(int i=0; i<v[x].size(); ++i)
        if(!viz[v[x][i]]) DF(v[x][i]);
    rez[++k]=x;
}
int main()
{
    int n,m,i,x,y;
    f>>n>>m;
    for(i=1; i<=m; i++)
    {
        f>>x>>y;
        v[x].push_back(y);
    }
    for(i=1; i<=n; i++)
        if(viz[i]==0) DF(i);
    for(i=n;i>=1;--i)
        g<<rez[i]<<" ";
    return 0;
}